:root {
  color-scheme: light;
  --bg: #f4f3ef;
  --panel: #faf9f6;
  --ink: #343b3a;
  --muted: #596563;
  --line: #dadcd7;
  --accent: #396e78;
  --accent-soft: #7cc7de;
  --dusty: #a8b8b6;
  --blush: #c1a39a;
  --mono: ui-monospace, "SF Mono", SFMono-Regular, Menlo, Consolas, "Liberation Mono", monospace;
  --gutter: clamp(20px, 4vw, 48px);
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 96px; }
body { margin: 0; background: var(--bg); color: var(--ink); font-family: -apple-system, BlinkMacSystemFont, "Helvetica Neue", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif; -webkit-font-smoothing: antialiased; }
p, h1, h2, h3, h4, figure, ul { margin: 0; }
a { color: inherit; text-decoration: none; }
a:hover { color: var(--accent); }
a:focus-visible { outline: 2px solid var(--accent); outline-offset: 4px; border-radius: 4px; }
::selection { background: #dbe8ee; color: var(--ink); }
.skip-link { position: fixed; top: 12px; left: 16px; z-index: 30; padding: 12px 16px; border-radius: 10px; background: var(--ink); color: #fff; transform: translateY(-160%); }
.skip-link:focus { transform: none; color: #fff; }
.reading-progress { position: fixed; top: 0; left: 0; z-index: 20; width: 100%; height: 2px; background: linear-gradient(90deg, var(--accent), var(--dusty)); transform: scaleX(0); transform-origin: left; pointer-events: none; }

.header { position: sticky; top: 0; z-index: 10; min-height: 78px; padding: 15px var(--gutter); display: flex; align-items: center; justify-content: space-between; gap: 20px; background: rgba(244, 243, 239, .88); backdrop-filter: blur(12px); -webkit-backdrop-filter: blur(12px); transition: box-shadow .35s ease; }
.header.is-scrolled { box-shadow: 0 8px 20px rgba(52, 59, 58, .06); }
.wordmark { display: flex; align-items: center; gap: 11px; font-size: 17px; font-weight: 600; letter-spacing: .1em; white-space: nowrap; }
.logo-mark { display: block; flex: none; width: 26px; height: 26px; border-radius: 7px; }
.wordmark-en { font-size: 10px; font-weight: 500; letter-spacing: .24em; text-transform: uppercase; color: var(--muted); }
nav { display: flex; gap: 6px; }
nav a { position: relative; padding: 9px 18px; font-size: 13px; color: var(--muted); transition: color .25s ease; white-space: nowrap; }
nav a::after { content: ""; position: absolute; right: 18px; bottom: 4px; left: 18px; height: 1px; background: var(--accent); transform: scaleX(0); transform-origin: left; transition: transform .35s ease; }
nav a:hover, nav a:focus-visible { color: var(--ink); }
nav a:hover::after, nav a:focus-visible::after { transform: scaleX(1); }

.hero { position: relative; isolation: isolate; min-height: 82vh; display: grid; place-items: center; text-align: center; overflow: hidden; padding: 60px 24px; }
.blob { position: absolute; border-radius: 50%; filter: blur(90px); pointer-events: none; z-index: -1; }
.blob-1 { width: clamp(280px, 38vw, 520px); height: clamp(280px, 38vw, 520px); left: 8%; top: 12%; background: rgba(127, 155, 145, .35); animation: drift 16s ease-in-out infinite alternate; }
.blob-2 { width: clamp(240px, 34vw, 460px); height: clamp(240px, 34vw, 460px); right: 10%; bottom: 8%; background: rgba(147, 174, 188, .4); animation: drift 19s ease-in-out infinite alternate-reverse; }
@keyframes drift { to { transform: translate(46px, 54px); } }
.hero-inner { position: relative; max-width: 760px; }
.hero-chip { display: inline-block; padding: 8px 20px; border-radius: 99px; background: rgba(255, 255, 255, .72); color: var(--muted); font-size: 12px; letter-spacing: .22em; }
h1 { margin-top: 36px; font-size: clamp(56px, 8vw, 116px); font-weight: 600; letter-spacing: .18em; line-height: 1.2; }
h1 span { display: inline-block; }
h1 .hero-accent { color: var(--accent); }
.english-name { margin-top: 20px; font-size: 12px; font-weight: 500; letter-spacing: .5em; text-transform: uppercase; color: var(--muted); }
.hero-tagline { margin-top: 26px; font-size: clamp(16px, 1.6vw, 21px); color: #5b6570; }
.hero-scroll { display: inline-flex; align-items: center; gap: 10px; margin-top: 44px; padding: 13px 26px; border-radius: 99px; background: #fff; color: var(--muted); font-size: 13px; box-shadow: 0 8px 22px rgba(52, 59, 58, .06); transition: transform .3s ease, box-shadow .3s ease, color .3s ease; }
.hero-scroll:hover { color: var(--ink); transform: translateY(2px); box-shadow: 0 8px 18px rgba(52, 59, 58, .09); }

.section-shell { max-width: 1160px; margin: 0 auto; padding: 100px var(--gutter); display: grid; grid-template-columns: .9fr 1.1fr; gap: clamp(40px, 5vw, 70px); align-items: center; }
.about { grid-template-areas: "photo intro" "photo body"; row-gap: 0; }
.about-intro { grid-area: intro; align-self: end; }
.about .photo { grid-area: photo; }
.about-body { grid-area: body; align-self: start; }
.photo { position: relative; overflow: hidden; background: var(--panel); box-shadow: 0 24px 48px rgba(52, 59, 58, .1); }
.photo::before, .statement-visual::before { content: ""; position: absolute; inset: 0; z-index: 2; background: var(--bg); transform: translateY(-101%); transition: transform 1.05s cubic-bezier(.2, .7, .2, 1); pointer-events: none; }
.photo::after { content: ""; position: absolute; inset: 12px; border: 1px solid rgba(255, 255, 255, .72); pointer-events: none; }
.photo img { display: block; width: 100%; aspect-ratio: 5 / 4; object-fit: cover; filter: saturate(.92); transition: transform 1s cubic-bezier(.2, .7, .2, 1); }
@media (hover: hover) and (pointer: fine) { .photo:hover img { transform: scale(1.045); } }
.kicker { font-size: 12px; letter-spacing: .24em; color: var(--accent); }
.about-intro h2 { margin-top: 22px; font-size: clamp(30px, 3.2vw, 50px); font-weight: 600; line-height: 1.5; }
.about-intro h2 span { color: var(--accent); background: linear-gradient(rgba(124, 199, 222, .32), rgba(124, 199, 222, .32)) no-repeat 0 92%; background-size: 100% .12em; transition: background-size .9s cubic-bezier(.2, .7, .2, 1); }
.about-lead { margin-top: 22px; font-size: clamp(16px, 1.5vw, 21px); line-height: 1.85; color: #55616b; }
.about-story { margin-top: 14px; color: var(--muted); font-size: 15px; line-height: 1.9; }
.about-principles { list-style: none; margin-top: 32px; padding: 0; display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 18px; }
.about-principles li { padding: 16px 0 0; border-top: 1px solid var(--line); }
.principle-idx { font-size: 11px; letter-spacing: .2em; color: var(--muted); }
.about-principles strong { display: block; margin: 10px 0 8px; font-size: 16px; letter-spacing: .16em; }
.about-principles p { color: #56636b; font-size: 13px; line-height: 1.7; }

.themes { background: linear-gradient(180deg, rgba(255, 255, 255, .5), rgba(255, 255, 255, 0)); }
.themes-wrap { max-width: 1160px; margin: 0 auto; padding: 88px var(--gutter) 104px; }
.chap { display: flex; justify-content: space-between; align-items: baseline; gap: 16px; font-size: 12px; letter-spacing: .24em; color: var(--muted); }
.chap h2 { font-size: inherit; font-weight: 500; letter-spacing: inherit; }
.theme-list { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; margin-top: 44px; }
.theme { position: relative; display: flex; flex-direction: column; min-height: 300px; padding: 28px 8px 20px; border-top: 2px solid var(--line); }
.theme:nth-child(2) { border-top-color: #c9d8d4; }
.theme:nth-child(3) { border-top-color: #ddcec7; }
.theme::before { content: ""; position: absolute; top: -2px; left: 0; width: 100%; height: 2px; background: var(--accent); transform: scaleX(0); transform-origin: left; transition: transform .55s cubic-bezier(.2, .7, .2, 1); }
.theme.is-revealing::before { transform: scaleX(.22); }
.theme-num { align-self: flex-start; font-family: var(--mono); font-size: 12px; letter-spacing: .2em; color: var(--accent); }
.theme h3 { margin: 38px 0 50px; font-size: clamp(30px, 2.8vw, 44px); font-weight: 600; letter-spacing: .14em; transition: color .35s ease, transform .55s cubic-bezier(.2, .7, .2, 1); }
.theme-detail h4 { font-size: 16px; font-weight: 600; line-height: 1.6; }
.theme-detail p { margin-top: 8px; color: #5d6a72; font-size: 14px; line-height: 1.8; }
.theme-keys { margin-top: 18px; padding-top: 13px; border-top: 1px solid rgba(58, 66, 63, .1); font-family: var(--mono); font-size: 12px; letter-spacing: .12em; color: var(--muted); }
@media (hover: hover) and (pointer: fine) {
  .theme:hover::before { transform: scaleX(1); }
  .theme:hover h3 { color: var(--accent); transform: translateX(6px); }
  .statement-visual:hover img { transform: scale(1.025); }
}

.statement { text-align: center; padding: 110px var(--gutter) 116px; }
.statement h2 { font-size: clamp(36px, 4.2vw, 64px); font-weight: 600; letter-spacing: .04em; }
.statement-note { margin: 26px auto 0; max-width: 36rem; color: var(--muted); font-size: 16px; line-height: 1.95; }
.statement-visual { position: relative; overflow: hidden; max-width: 1060px; margin: 52px auto 0; text-align: left; }
.statement-visual img { display: block; width: 100%; height: auto; transition: transform 1.2s cubic-bezier(.2, .7, .2, 1); }
.statement-visual figcaption { position: absolute; bottom: clamp(16px, 4vw, 44px); left: clamp(16px, 4vw, 44px); display: flex; flex-direction: column; gap: 5px; padding: 14px 18px; border-left: 2px solid var(--accent); background: rgba(250, 249, 246, .86); backdrop-filter: blur(8px); -webkit-backdrop-filter: blur(8px); color: var(--ink); font-size: 13px; letter-spacing: .12em; box-shadow: 0 12px 28px rgba(52, 59, 58, .08); }
.statement-visual figcaption span:last-child { color: var(--muted); font-family: var(--mono); font-size: 11px; letter-spacing: .08em; }

.contact { padding: 0 var(--gutter) 100px; }
.contact-panel { position: relative; max-width: 1000px; margin: 0 auto; padding: clamp(36px, 4.6vw, 64px) clamp(26px, 4.4vw, 64px); display: grid; grid-template-columns: .8fr 1fr; gap: 40px; align-items: center; background: linear-gradient(160deg, #f5f4f0, #e9ede9); border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.contact-panel::before { content: ""; position: absolute; top: -1px; left: 0; width: 100%; height: 2px; background: var(--accent); transform: scaleX(.12); transform-origin: left; transition: transform .9s cubic-bezier(.2, .7, .2, 1); }
.contact-panel.is-revealing::before { transform: scaleX(.35); }
.contact-title { margin-top: 18px; font-size: clamp(28px, 3.2vw, 48px); font-weight: 600; line-height: 1.55; }
.contact-copy { max-width: 28rem; padding-left: 28px; border-left: 1px solid var(--line); color: var(--muted); font-size: 16px; line-height: 1.9; }
.contact-note { margin-top: 18px; font-size: 13px; }

footer { max-width: 1160px; margin: 0 auto; padding: 26px var(--gutter) 34px; border-top: 1px solid var(--line); display: flex; justify-content: space-between; align-items: center; gap: 16px; flex-wrap: wrap; color: var(--muted); font-size: 13px; line-height: 1.7; }
.footer-brand { display: flex; align-items: center; gap: 9px; }
.footer-mark { display: block; flex: none; width: 22px; height: 22px; border-radius: 6px; }
footer a[href="https://beian.miit.gov.cn/"] { font-family: var(--mono); letter-spacing: .04em; }
.back-top span { margin-left: 8px; }

.motion-ready .reveal:not(.is-revealing) { opacity: 0; transform: translateY(18px); }
.motion-ready .about-intro h2:not(.is-revealing) span { background-size: 0 .12em; }
.motion-ready .photo:not(.is-revealing)::before, .motion-ready .statement-visual:not(.is-revealing)::before { transform: translateY(0); transition: none; }
.motion-ready .photo:not(.is-revealing) img, .motion-ready .statement-visual:not(.is-revealing) img { transform: scale(1.04); }
.motion-ready .statement-visual:not(.is-revealing) figcaption { opacity: 0; transform: translateY(12px); }
.reveal.is-revealing { animation: reveal .55s cubic-bezier(.2, .7, .2, 1) both; }
.statement-visual.is-revealing figcaption { animation: caption-reveal .7s .55s cubic-bezier(.2, .7, .2, 1) both; }
.theme:nth-child(2).is-revealing { animation-delay: .05s; }
.theme:nth-child(3).is-revealing { animation-delay: .1s; }
@keyframes reveal { from { opacity: 0; transform: translateY(18px); } to { opacity: 1; transform: none; } }
@keyframes caption-reveal { from { opacity: 0; transform: translateY(12px); } to { opacity: 1; transform: none; } }

@media (max-width: 1100px) {
  .section-shell { gap: 44px; }
  .theme { min-height: 300px; }
}
@media (max-width: 960px) {
  .section-shell { grid-template-columns: 1fr; padding: 76px var(--gutter); }
  .about { grid-template-areas: "intro" "photo" "body"; row-gap: 32px; }
  .about-lead { margin-top: 0; }
  .theme-list { grid-template-columns: 1fr; }
  .theme { min-height: 0; }
  .theme h3 { margin-bottom: 28px; }
  .contact-panel { grid-template-columns: 1fr; }
  .contact-copy { max-width: none; }
  .wordmark-en { display: none; }
}
@media (max-width: 600px) {
  html { scroll-padding-top: 82px; }
  .header { min-height: 68px; padding: 13px 16px; gap: 8px; }
  .wordmark { gap: 7px; font-size: 15px; letter-spacing: .04em; }
  nav { gap: 2px; }
  nav a { padding: 9px 10px; font-size: 13px; }
  nav a::after { right: 10px; left: 10px; }
  .hero { min-height: 0; padding: 88px 20px 72px; }
  .blob-1 { left: -18%; top: 4%; }
  .blob-2 { right: -16%; bottom: 2%; }
  h1 { font-size: clamp(46px, 13vw, 64px); letter-spacing: .14em; }
  .hero-scroll { margin-top: 36px; }
  .section-shell { padding: 64px var(--gutter); }
  .about-principles { grid-template-columns: 1fr; gap: 0; margin-top: 24px; }
  .about-principles li { display: grid; grid-template-columns: 30px 50px minmax(0, 1fr); align-items: baseline; gap: 8px; padding: 14px 0; }
  .about-principles strong { margin: 0; font-size: 15px; }
  .themes-wrap { padding: 64px var(--gutter); }
  .theme-list { margin-top: 30px; }
  .theme { padding: 20px 0; }
  .theme h3 { margin: 16px 0 12px; font-size: 32px; }
  .theme-keys { margin-top: 12px; padding-top: 10px; }
  .statement { padding: 80px 20px 84px; }
  .statement-visual { margin-top: 36px; }
  .statement-visual figcaption { padding: 10px 12px; font-size: 12px; }
  .contact { padding: 0 var(--gutter) 76px; }
  .contact-copy { padding: 18px 0 0; border-left: 0; border-top: 1px solid var(--line); }
  footer { flex-direction: column; align-items: flex-start; gap: 10px; }
  footer .footer-brand span span { display: block; }
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation: none !important; transition: none !important; }
  .reading-progress { display: none; }
  .motion-ready .reveal:not(.is-revealing) { opacity: 1; transform: none; filter: none; }
  .motion-ready .about-intro h2:not(.is-revealing) span { background-size: 100% .12em; }
  .photo::before, .statement-visual::before { display: none; }
  .motion-ready .photo:not(.is-revealing) img, .motion-ready .statement-visual:not(.is-revealing) img { transform: none; }
  .motion-ready .statement-visual:not(.is-revealing) figcaption { opacity: 1; transform: none; }
}